DYNAMICS AND TRANSIT VARIATIONS OF RESONANT EXOPLANETS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10331706" target="_blank" >RIV/00216208:11320/16:10331706 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3847/0004-637X/823/2/72" target="_blank" >http://dx.doi.org/10.3847/0004-637X/823/2/72</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/0004-637X/823/2/72" target="_blank" >10.3847/0004-637X/823/2/72</a>

Result language

angličtina

Original language name

DYNAMICS AND TRANSIT VARIATIONS OF RESONANT EXOPLANETS

Original language description

Transit timing variations (TTVs) are deviations of the measured midtransit times from the exact periodicity. One of the most interesting causes of TTVs is the gravitational interaction between planets. Here we consider a case of two planets in a mean motion resonance (orbital periods in a ratio of small integers). This case is important because the resonant interaction can amplify the TTV effect and allow planets to be detected more easily. We develop an analytic model of the resonant dynamics valid for small orbital eccentricities and use it to derive the principal TTV terms. We find that a resonant system should show TTV terms with two basic periods (and their harmonics). The resonant TTV period is proportional (m/M*)(-2/3), where m and M* are the planetary and stellar masses. For m = 10(-4) M*, for example, the TTV period exceeds the orbital period by about two orders of magnitude. The amplitude of the resonant TTV terms scales linearly with the libration amplitude. The ratio of the TTV amplitudes of two resonant planets is inversely proportional to the ratio of their masses. These and other relationships discussed in the main text can be used to aid the interpretation of TTV observations.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BN - Astronomy and celestial mechanics, astrophysics

OECD FORD branch

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Project

<a href="/en/project/GA13-01308S" target="_blank" >GA13-01308S: Dynamics of small bodies in the solar system</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

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Volume of the periodical

823

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

20

Pages from-to

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UT code for WoS article

000377410000003

EID of the result in the Scopus database

2-s2.0-84975087299